With the installer in your Applications folder, use Terminal to create an ISO for virtual machines:
Many users look for an ISO file to perform , create bootable USB drives , or run the OS within a Virtual Machine (like VMware or VirtualBox) on Windows or Linux. Because Apple officially moved to the ".app" installer format via the Mac App Store, finding a raw ISO usually requires manual conversion or third-party downloads. The Safest Way to Download mac os x 1011 el capitan iso download link